Mahou Sensou, also known as Magical Warfare, is the anime adaptation of the light novel by the same name. It aired on January 9, 2014.
Plot[]
Takeshi Nanase is an ordinary high school boy until the day he comes across a girl collapsed on the school campus. The girl, in a uniform he has never seen before, is named Mui Aiba and she claims to be a magician. Mui then apologizes to Takeshi because she turned him into a magician, too, and what Takeshi once thought was just one world is actually two — the world where magicians live and the world where humans live.